Process of producing aluminum phosphide from yellow phosphorus and recovering byproducts simultaneously

Abstract

The invention provides a process of producing aluminum phosphide from yellow phosphorus and recovering byproducts simultaneously. The method radically overcomes the problems of low labor productivity, great investment and equipment scale, a low utilization rate of raw materials, high production cost, severe leakage of flue gas of phosphorus-containing compounds, considerable flue dust in a production environment, severe environmental pollution and the like in conventional processes for producing the original drug of aluminum phosphide. According to the invention, yellow phosphorus and aluminum powder are mixed under stirring and sent to an oxygen-poor reaction furnace and an oxygen-rich reaction furnace for reaction to prepare the original drug of aluminum phosphide; resultant gas is subjected to condensation, separation and wet absorption, and yellow phosphorus, phosphoric pentoxide and phosphoric acid are respectively recovered; the production process for the original drug of aluminum phosphide in the invention belongs to the field of high efficiency pesticide fumigation insecticides.

Description

technical field [0001] The invention relates to the field of high-efficiency pesticide fumigation and insecticide production, in particular to a method for producing chemical pesticide aluminum phosphide raw materials using yellow phosphorus and aluminum powder as raw materials with poor oxygen, that is, using yellow phosphorus to produce aluminum phosphide and recovering by-products (yellow phosphorus) Phosphorus, phosphorus pentoxide, phosphoric acid) process. Background technique [0002] At present, at home and abroad, only red phosphorus and aluminum powder can be used as raw materials to produce chemical pesticide aluminum phosphide. Ignition reaction in the tunnel kiln or on the combustion rack to produce aluminum phosphide. A large amount of flue gas containing phosphorus compounds produced by this reaction cannot be separated and recovered. It needs to be sprayed with water and absorbed into a dilute phosphate liquid with no industrial value. [0003] However, the ...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a process for producing aluminum phosphide using yellow phosphorus while recovering by-products (yellow phosphorus, phosphorus pentoxide, phosphoric acid), and fundamentally solve the laborious process of the existing process for producing aluminum phosphide. Low productivity, large investment and equipment scale, low utilization rate of raw materials, high production cost, serious flue gas leakage of phosphorus-containing compounds, heavy smoke and dust in the production environment, serious environmental pollution, etc.

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